Datasheet AD9288 (Analog Devices)

8-Bit, 40/80/100 MSPS Dual A/D Converter AD9288 FEATURES FUNCTIONAL BLOCK DIAGRAM Dual 8-bit, 40 MSPS, 80 MSPS, and 100 MSPS ADC VDD Low power: 90 mW at 100 MSPS per channel On-chip reference and track-and-hold ENC TIMING AD9288 R A E T 475 MHz analog bandwidth each channel GIS SNR = 47 dB @ 41 MHz AINA 8 8 T/H ADC D7A–D0A A 1 V p-p analog input range each channel INA UT RE Single 3.0 V supply operation (2.7 V to 3.6 V) SELECT 1 REFINA OUTP Standby mode for single-channel operation REFOUT REF SELECT 2 Twos complement or offset binary output mode REF R INB E DATA FORMAT Output data alignment mode T SELECT Pin-compatible 10-bit upgrade available GIS AINB 8 8 T/H ADC D7B–D0B AINB UT RE APPLICATIONS ENC TIMING B OUTP Battery-powered instruments Hand-held scopemeters V GND V D DD
00585-001
Low cost digital oscilloscopes
Figure 1.
I and Q communications GENERAL DESCRIPTION
The AD9288 is a dual 8-bit monolithic sampling analog-to- The Encode input is TTL/CMOS-compatible, and the 8-bit digital converter with on-chip track-and-hold circuits. It is digital outputs can be operated from 3.0 V (2.5 V to 3.6 V) optimized for low cost, low power, small size, and ease of use. supplies. User-selectable options offer a combination of standby The product operates at a 100 MSPS conversion rate with modes, digital data formats, and digital data timing schemes. In outstanding dynamic performance over its full operating range. standby mode, the digital outputs are driven to a high Each channel can be operated independently. impedance state. The ADC requires only a single 3.0 V (2.7 V to 3.6 V) power Fabricated on an advanced CMOS process, the AD9288 is supply and an Encode clock for full-performance operation. No available in a 48-lead surface-mount plastic package (7 mm × external reference or driver components are required for many 7 mm, 1.4 mm LQFP) specified over the industrial temperature applications. The digital outputs are TTL/CMOS-compatible, range (–40°C to +85°C). The AD9288 is pin-compatible with and a separate output power supply pin supports interfacing the 10-bit AD9218, facilitating future system migrations. with 3.3 V or 2.5 V logic.
Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. or otherwise under any patent or patent rights of Analog Devi ces. Trademarks and Tel: 781.329.4700 www.analog.com registered trad emarks are the property of their respective owners. Fax: 781.326.8703 © 2004 Analog Devices, Inc. All ri ghts reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS EXPLANATION OF TEST LEVELS TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS TERMINOLOGY THEORY OF OPERATION USING THE AD9288 ENCODE INPUT DIGITAL OUTPUTS ANALOG INPUT VOLTAGE REFERENCE TIMING USER-SELECTABLE OPTIONS AD9218/AD9288 CUSTOMER PCB BOM EVALUATION BOARD POWER CONNECTOR ANALOG INPUTS VOLTAGE REFERENCE CLOCKING DATA OUTPUTS DATA FORMAT/GAIN TIMING TROUBLESHOOTING OUTLINE DIMENSIONS ORDERING GUIDE